Q.3:- What are polyatomic ions? Give examples.
Answer:-
A polyatomic ion is a group of atoms carrying positive or negative charge.
e.g.
Polyatomic ions Symbol
Ammonium NH4+
Hydroxide OH–
Nitrate NO3–
Hydrogen carbonate HCO3–
Sulphate SO42-
Sulphite SO32-
Phosphate PO43-
Carbonate CO32-